Lesson 14 schizophrenia biological factors

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  • Lesson 14 schizophrenia biological factors

    1. 1. Lesson 14: Schizophrenia Biological Factors
    2. 2. Lesson 13: Research Methods Exam QuestionA researcher is investigating the effects on the sleep cycle of subjects using alavender-scented pillow, which she believes will decrease nightmares. She has two groups of subjects. Subjects in group one have lavender scented pillowsand in the other they have pillows scented with other herbs. The researcheranalyses subjects’ dreams for negative content the next day. The subjects are not aware of which herbs are thought to reduce nightmares and the researcher is not aware of which subjects are using lavender and which are using other herbs.1) The researcher is using:A) a single-blind procedure to eliminate the placebo effectB) a single-blind procedure to eliminate subjects expectationsC) a double-blind procedure to eliminate experimenter biasD) a double-blind procedure to eliminate placebo and experimenter effects2) Highlight the information in the scenario that aided your answer in q1
    3. 3. Lesson 13: Research Methods Exam QuestionA researcher is investigating the effects on the sleep cycle of subjects using alavender-scented pillow, which she believes will decrease nightmares. She has two groups of subjects. Subjects in group one have lavender scented pillowsand in the other they have pillows scented with other herbs. The researcheranalyses subjects’ dreams for negative content the next day. The subjects are not aware of which herbs are thought to reduce nightmares and the researcher is not aware of which subjects are using lavender and which are using other herbs. Both don’t know - double blind experimenter placebo effect effect1) The researcher is using:A) a single-blind procedure to eliminate the placebo effectB) a single-blind procedure to eliminate subjects expectationsC) a double-blind procedure to eliminate experimenter biasD) a double-blind procedure to eliminate placebo and experimenter effects2) Highlight the information in the scenario that aided your answer in q1
    4. 4. Lesson 14: Schizophrenia Biological Factors Outcomes Explain the biological factors; genetic predisposition;drug-induced onset; changes in brain activity; the use of medication that blocks dopamine to treat psychosis
    5. 5. ABC AmericaPart 1: Part 2:
    6. 6. ABC AmericaPart 1: Part 2:
    7. 7. ABC AmericaPart 1: Part 2:
    8. 8. Schizophrenia Defined Psychosis: loss of contact with reality Schizophrenia is type of psychotic disorder characterised by:- disturbances of thinking (delusions & hallucinations) - disorganised thoughts & behaviour - unusual emotions
    9. 9. Biological Contributing Factors Drug Induced Onset GeneticPredisposition Changes in brain activity
    10. 10. Genetic Predisposition Essentially means that family members of those suffering from schizophrenia have a tendency to develop the disorder. This does not mean they will!Research has found that the closer the relation - the higher the tendency is to develop the disorder Unrelated person in general population - 1% Identical twins - 48%
    11. 11. Drug Induced OnsetThe use of certain drugs particularly those that manipulate the brains use of the chemical Dopamine has been shown to lead to mental health problems. Such drugs include: Hallucinogens (LSD), Stimulants (amphetamines, cocaine, ecstasy), Phencyclidine (PCP), and Cannabis (marijuana) Some mimic the effect of positive symptoms and can result in a first psychotic episode If experience symptoms whilst under influence of drugs - then isreferred to as a drug-induced psychosis or in DSM substance induced psychotic disorder.
    12. 12. Changes in brain activityDopamine theory: schizophrenia is caused by too much dopamine in the brainEnlarged ventricles: Patients of schizophrenia show a loss of brain tissue in the brain (see figure 21.32 of text p 523) involved in emotions, thinking and information processing. Prefrontal cortex activity: Hypofrontality - patients of schizophrenia show a reduced level of brain activity in the prefrontal area of the brain
    13. 13. Biological Management According to the dopamine theory or dopaminehypothesis - schizophrenia is caused by the release of too much dopamine in the brain. Anti-psychotic medications (aka anti psychotics and neuroleptics) are designed to reduced the level of dopamine and thus relieve patients of positive symptoms. Dopamine-blocking medication - dopamine antagonists - block dopamine activity at the synapse
    14. 14. Essential Learning ActivitiesActivity 1: SymptomologyComplete activity sheet on wikiActivity 2: Genetic PredispositionCreate a visually appealing digital poster using web imagery of self / self portraits / family portraits orcartoon or television families (like the Simpsons) to demonstrate understanding of proposed geneticpredisposition for Schizophrenia and an understanding of appropriate terminiology such as“monozygotic” (identical), “dizygotic” (fraternal) and “concordance rate” in reference to twin studies.Figure 21.30 of text book p 520, will assist you with rate data.Activity 3: Biological explanations of schizophreniaCreate a mind map of the following explanations of schizophrenia- genetic- biochemical- neuroanatomicalInclude:-description of explanation-the research method used to find evidence-one research study which provides evidence

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